Looking for coil replacement balances

A contractor from Harrisburg, PA says:
I could not find a brand on the lock or header of the window. Window size is 36.75 X 49.25.
Profile picture of Casey
Casey from SWISCO responded:

Hello,

We can't be sure with your hardware still installed in the window but your pivot shoe looks similar to our 15-228 , which uses Series 160 coil springs. I'd recommend removing your coil balance to compare to the specifications shown on our product pages. Thank you! 

How to Remove a Pivot Shoe (Cutout Method)
How to Remove a Pivot Shoe (Cutout Method)
VIDEO
WATCH >
How to remove window pivot shoes
How to remove window pivot shoes
VIDEO
WATCH >
Anatomy of a tilt window
Anatomy of a tilt window
VIDEO
WATCH >
Reply to Thread
Use this form to ask a follow-up question or to share your experience regarding this subject.
(your email address will be kept private and is only used to inform you when a response has been made)
Current wait time is 4-7 business days
We promise that one of our experts will personally get back to you as soon as they are able. Thank you very much for your patience and understanding. If your inquiry is time-sensitive, please feel free to reach us at (888) 991-1929 or at help@swisco.com.